Comparative assessment of stoichiometric and lean combustion modes in boosted spark-ignition engine fueled with syngas

Hydrous-ethanol is reformed to hydrogen-rich mixture gas which is an excellent fuel for engines. The advantages of this approach are that fossil fuel consumption and CO2 emissions are reduced, and the waste heat from engine exhaust can be used as energy source for hydrous-ethanol evaporating and reforming. The experiment is carried out on a gasoline engine as primary engine with only modest changes. The results indicate that the hydrogen-rich mixture gas allows operation at much higher compression ratio due to its intrinsic octane number which could contribute to the power performance, and the NOx, CO, THC emissions are reduced remarkably because of lean combustion realized in the cylinder.

Download Full-text

Effects of compression ratio and hydrogen addition on lean combustion characteristics and emission formation in a Compressed Natural Gas fuelled spark ignition engine

Fuel ◽

10.1016/j.fuel.2017.07.024 ◽

2017 ◽

Vol 208 ◽

pp. 260-270 ◽

Cited By ~ 46

Author(s):

J. Pradeep Bhasker ◽

E. Porpatham

Keyword(s):

Natural Gas ◽

Compression Ratio ◽

Spark Ignition ◽

Combustion Characteristics ◽

Spark Ignition Engine ◽

Compressed Natural Gas ◽

Hydrogen Addition ◽

Lean Combustion

Download Full-text

Comparative Assessment of the Performance and Emission Characteristics of Port and Manifold Gasoline Fuel Injection Systems of a Single Cylinder Four Stroke Spark Ignition Engine

10.4271/981460 ◽

1998 ◽

Cited By ~ 1

Author(s):

Najibullah K. Omary ◽

T. S. Bhatti ◽

J. P. Subrahmanyam ◽

M. K. Gajendra Babu

Keyword(s):

Fuel Injection ◽

Spark Ignition ◽

Comparative Assessment ◽

Spark Ignition Engine ◽

Emission Characteristics ◽

Single Cylinder ◽

Performance And Emission

Download Full-text

Effect of Engine Variables on Combustion Performance of Lean Burn Spark Ignition Engine: An Overview

Heat Transfer, Volume 3 ◽

10.1115/imece2002-39052 ◽

2002 ◽

Author(s):

A. Manivannan ◽

R. Ramprabhu

Keyword(s):

Internal Combustion Engines ◽

Flow Characteristics ◽

Exhaust Emissions ◽

Spark Ignition ◽

Spark Ignition Engine ◽

Combustion Stability ◽

Combustion Engines ◽

Si Engine ◽

Lean Burn ◽

Lean Combustion

In the development of internal combustion engines, there has been a continuous effort to reduce fuel consumption and exhaust emissions. Lean combustion is a preferred concept for reducing exhaust emissions for meeting stringent emission standards. However lean combustion is associated with increased cycle-by-cycle combustion variation due to combustion instability. The combustion stability under lean mixture conditions could be improved through enhancement of flow characteristics. Effect of engine variables on lean combustion of Spark Ignition (SI) engine is presented, including combustion chamber and inlet port configuration, and ignition system. Use of pre-chamber for lean combustion is one of the feasible method to achieve stable ignition and quick flame propagation. This paper highlights and compares status of various research works carried out in the area of lean burn engines. A critical analysis of reported experimental data is presented in order to substantiate use of lean combustion in SI engine.

Download Full-text